Hitecsa EWMIM Serie Manual De Instalación, Uso Y Mantenimiento página 68

The following information is indicative. The proposed schemes are incomplete and only serve to establish guidelines that allow the best use of units in
some particular cases.
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II.9.1.1 Chiller or heat pump set-up with DS or RC100
Chiller
With this type of system, the main hydraulic circuit of the chiller is connected to the user and produces cold water for air conditioning. The unit can be
set-up as a pump or pump and storage tank as alternative to the traditional solution seen installed in the system. The desuperheater (DS), with which
the machine can be supplied, will be connected by means of a technical water storage tank and external pump for DHW or to the system to produce hot
water for the post-heating coils of the CTA or other applications. Total recovery (RC100), as an alternative to DS, can be used in the same applications,
however, the amount of heat produced is significantly higher and, at the same time, the heat level of the water produced is lower.
Heat pump with partial recovery (DS) - 2-Pipe+DHW system
Should the unit be a reversible heat pump, summer operation is the same as the aforementioned situation of the chiller. Instead, with winter operation,
the user has DHW produced from the heat pump. If the unit is equipped with a DS desuperheater, this can be also active in winter mode; however, in
this case, this value is deducted from the portion of heat from the hot water produced from the main heat exchanger.
Activation and deactivation of DS and RC100
The units installed with DS desuperheater or complete recovery RC100 are fitted with the "recovery consent "CRC100-CDS" reported in the wiring
diagram in order to activate the thermal recovery. This contact can be managed, for instance, with the TRD – Thermostat with display accessory.
On the other hand, it is possible to establish from the panel the criterion with which to cease heat recovery
• for digital contact ("CRC100-CDS" – consent recovery): if the consent is interrupted, heat recovery will cease. This mode meets the requirement
to carry out a temperature control system of the tank connected to the recovery;
•
for maximum temperature: in this case the "CRC100-CDS - recovery consent" must always be enabled. The maximum recovery temperature limit
is set from the panel on the machine (see manual Electronic controls) or from the remote keypad (KTR accessory). The recovery keeps operating until
the recovery temperature is below the set limit;
IOM_EWMIM-EWMIMH_120a262_207984_200601_ES-EN-FR-DE-IT
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1 Chiller or Heat pump (138÷262)
2 System user side storage tank
3 Pump
6 System recovery side storage tank
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ADVANCE